gistfile1.html

<div class="form">
    <input type="text" data-email-form name="firstName" />
    <input type="text" data-email-form name="lastName" />
    <input type="text" data-email-form name="email" />
    <input type="text" data-email-form name="firstName" />
    <input type="submit" 
           class="js-modal-submit-trigger" 
           data-url="/services/EmailSignUpService.asmx/SignUp" 
           data-method="POST" 
           data-form-fields="data-email-form" />
</div>